Tens transfer device for calculating machines and the like



May 8, "1956 E. K. GRIP 2,744,686

TENS TRANSFER DEVICE FOR CALCULATING MACHINES AND THE LIKE Filed Sept.50; 1952 2 Sheets-Sheet l //VVENTO Er/A' Kori/"046 7)? A TTOFPNEYS E. K.GRIP May 8, 1956 TENS TRANSFER DEVICE FOR CALCULATING MACHINES AND THELIKE Filed Sept. 30, 1952 2 Sheets-Sheet 2 N VE N 7'01? f i/r KonradATTORNEYS United States Patent TENS TRANSFER DEVICE FOR CALCULATINGMACHINES AND THE LIKE Erik Konrad Grip, Atvitlaberg,

Sweden, assignor to Aldic' bolaget Atvidaberg-Facit,

Atvidaberg, Sweden Application September 30, 1952, Serial No. 312,364

Claims priority, application Sweden October 11., 1951 7 Claims. c1.ass-14s;

128=4 is carried out in the following manner:

The first numeral or digit (1) is not registered, as it is beyond thecapacity of the accumulator. The device according to the inventionrenders it possible to use a very simple register or accumulator, whilesimultaneously attaining the advantages of a driving mechanism whichsolely operates only in the additive direction. Addition and subtractionof a number set in each denominational order is effected by displacingthe register axially relative to the rotor or actuator of the machine,so that in relation to each other they assume one of two calculatingpositions, representing addition and subtraction respectively. In thedevice according to the invention the same tens transfer elements areused for both positions, which means a substantial simplification of themachine so that a small and compact construction is attained.

An embodiment of a device according to the invention as applied to amachine of the pin wheel type is described below and illustrated in thedrawing. Referring now to the drawings, Fig. l is a cross-sectionthrough the pin Wheel rotor or actuator of the machine and the elementscooperating with said rotor.

Fig. 2 is a section along the line ll-II in Fig. 1.

Fig. 3 is a longitudinal sectional view through the pin wheel rotor,when said pin wheel rotor assumes the position of subtraction inrelation to the register.

Fig. 4 is a view analogous to Fig. 3 but showing the rotor in itsposition of addition.

Fig. 5 is a detailed view of a modified embodiment of a tens transferpin according to the invention.

The rotor or actuator 1 is displaceably mounted axially on its drivingshaft 2. A spline 3 prevents the rotor from rotating in relation to theshaft and causes it to follow the rotation of the shaft. The rotor 1consists of a number of calculating discs 5 provided on a rotor tube 4.At one end said tube has a flange 4a and the calculating or actuatordiscs 5 are secured to the tube by means of a nut 7 which also clamps anend disc 6 serving to move the rotor one denominational order at a time.The rotor is provided with actuator pins 8, each mounted on a pivot 9which is secured in the calculating disc 5. The pins 8 are rockable ingrooves in the disc 5.

In the first, or lowest denominational order, calculating disc of therotor, ten calculating pins 8 are provided, nine pins being provided inthe other discs. All the discs except the first are also provided with atens transfer pin 11 mounted on a pivot 10. A plate or leaf spring 12tends to turn said pin clockwise in Fig. 3. The tens transfer pins 11are in a manner known per se arranged in a helical line for elfecting athrough tens transfer.

Setting discs 13 are rotatably journalled 0n the calculating discs 5,said setting discs being provided with cam slots 13a which guide thecalculating pins 8. Each setting disc is latched in its separatepositions by a ball stop or latch 14 which cooperates with holes 1312 inthe setting discs 13. In addition a locking rail 15 is provided forlocking the discs to prevent them from being turned in relation to thediscs 5 when the rotor rotates, that is during the calculatingoperations.

An accumulator is carried by two shafts 16 and 17 on which guide plates18 are attached. These plates are held in their respective axialpositions by guides 19, 20, 21 and 22. The shafts 16 and 17 and theguides 19-22 are carried in well-known manner by the machine frame.

The digit or numeral wheels 23 of the register are each provided withten teeth and mounted on a shaft 24. Each numeral wheel is in mesh withan intermediate wheel 25 which is also provided with ten teeth andmounted on a shaft 26. The intermediate wheel and thus also its numeralwheel are locked by a latching hook 28 mounted on a shaft 27 andactuated by a hook spring 29.

The intermediate wheel 25 carries a tens transfer tooth 2511, which,when the numeral wheel is turned by an amount corresponding to the anglebetween the numerals 9 and 0, actuates a tooth 30a on a transfer hook3t}. Said hook then is turned counter-clockwise to its transferposition, and then the transfer pin 11 is brought into mesh with a curveor cam 30b on the transfer hook (see Fig. 2). When the hook assumes itsnormal position, the transfer pin 11 passes freely below the curve 301)of the transfer hook 30 and is not actuated by said curve. The transferhook is latched in its two positions in known manner by a ball stop 32,33.

When the tens transfer pin has passed by the intermediate wheel, thetransfer hook is restored to its position of rest by a rotating shaft 34which by means of a spline 35 strikes against a projection on thetransfer hook. The shafts 34 and 2 are interconnected via gear wheelsand rotate at the same number of revolutions in the direction indicatedby arrows in Fig. 1.

In the guide plates 18 a cam 18:: is formed the function of which is toguide the tens transfer pin 11, so that said pin, when passing theintermediate wheels 25, has the same position axially in relation tosaid intermediate wheels and to the transfer hooks 36 respectively, bothin the position of addition and in the position of subtraction. This isparticularly clear from Fig. 3 for the disc C, and from Fig. 4 for thedisc C.

in Fig. 5 a modified guide for the tens transfer pin is shown. Said pinis mounted on its pivot 19 close by the shaft 2 which is provided withradial grooves 40 cooperating with a ball guide 4-1 or the like actingon a projection 42 on the tens transfer pin 11, as shown. When in thiscase the rotor is moved in the axial direction to its position ofaddition, the pin will be rocked or tilted correspondingly.

in well-known manner the setting rotor is shiftable i. e. axiallydisplaceable between the various denominational orders and in eachdenomination it is shiftable between a position of addition and aposition of subtraction, which positions are spaced axially a half stepfrom each other, that is half of the distance between the central planesof two adjacent numeral wheels. in each denominational order theposition of subtraction is located to the left and the position ofaddition to the right.

The device functions in the following way:

For setting a digit the disc 13 is turned to the position correspondingthereto. The calculating pins 8 thus actuated then are rocked from theposition shown for the disc A inPigsJB and 4 to the position shown forthe disc B. That portion 'of" the calculating 'pin" that -actuates theregister is then moved axially a distance corresponding to the distancebetween the position of addition and theposition of subtraction.

Theposition of the calculating pin when the digit 1 has been set is seenfrom Figure '1. Fig. 3 shows that in the position of subtraction thosepins which are not set, operate on the corresponding intermediate wheel,while-those pins which are set pass freeiy'by. In the position ofaddition the conditions are the reverse which can be seen fromFig. 4.Besidesflt is evident from what is stated above that in the position ofaddition each numeral wheel is turned a number of-teethcorresponding tothe number of pins 3 set-on the disc 5 in the same denomination. In theposition of subtraction the numeral wheel will instead berotated for alldenominations, nine steps less the number of pins set, except in thefirst or lowest denomination in which the numeral wheel is rotated tensteps less the number of pins set, because the disc in the lowestdenomination has ten teeth whereas the other discs have but nine teeth.From the following example of a machine with a capacity of sixdenominational orders it can be seen that in the minus position additionis carried out by adding the complement of the numeral set.

Say that the item set is: 2307.

In the position of addition the calculating operation is: +2307.

In the position of subtraction the calculating operation is:+997693=(l)002307. As mentioned in the example stated in the preamblethe first figure (l) is not registered as it is beyond the capacity ofthe register. Thus,.the register indicates the result: OO2307.

The tens transfer is to a large extent based on well known principles.As mentioned above the transfer hook 30 is moved to its working oroperative position by the tooth 25a-when the numeral wheel passes fromthe value 9 to the-value 0. In Fig. 1 and also in Fig. 3 for thedenomination C and in Fig. 4 for thedenomination C this tooth is shownin the position it assumes for the numeral 0. In the operative positionof the transfer hook 30 its curve 30b will push the transfer pin 11aside so that its calculating projection 11a willengage the intermediatewheel 25 and turn it one tooth in well-known manner. This position isshown in Fig. 3 for the denomination D and in Fig. 4, for thedenomination D from which it is evident that the same result will beobtained at addition as well as at subtraction.

The rotor 1 may be driven manually or by a motor, and the deviceaccording to the invention may be applied to electrical as well as tomanual machines. In the embodiment described above the shifting todifferent denominations is effected by shifting the rotor 1, but saidrotor may as Well be stationary in the axial direction, while theregister is shifted stepwise in the manner usual in machines of theOdhner type.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A tens transfer device for calculating machines of the type in whichsubtraction is effected by adding the complement of an item to beaccumulated, in which a rotor is displaced axially relative to theaccumulator wheels to set the machine for addition or subtraction, therotor pins effective on the accumulator wheels in the subtractiveposition being those unoperated when the item is set in the rotor,comprising; in combination, "a'tenstr'ansfer pin for each denominationalorder except the lowest, means mounting said pins on said rotor forlimited axial movement relative thereto, means for causing each transferpin to follow a predetermined'path adjacent the accumulator wheel of thenext higher order during at least a portion of the rotation of saidrotor, said means causing said transfer pins to follow the said pathswhether the machine is set for addition or subtraction, and meansassociated with each accumulator wheel to move the transfer pinassociated with theparticular denominational order from saidpredetermined path into the path of the wheel of next higherdenominational order.

2. A device as claimed in claim 1, characterized in that means forcausing said transfer pins to follow the same predetermined pathadjacent said accumulator wheels comprises cam means fixed to the rotorshaft, and means urging said transfer pins into contact with said cammeans.

3. A device as claimed in claim 1, characterized in that said means formoving the transfer pins'out of the predetermined path into the path ofthe accumulator wheel of the next higher denominational order, comprisesa cam radially movable into the said predetermined path upon movement ofthe accumulator wheel from its 9 to its 0 position.

4. A device as claimed in claim 1, characterized in that said transferpins are pivotally mounted on the rotor disks adjacent the centersthereof, the radially outermost end of said transfer pins moving in asubstantially axial path.

5. A device as claimed in claim 4, characterized in that the radiallyoutermost end of said pin makes contact with said path determining meansand with said means for moving the pin out of the predetermined pathsand further characterized in that a portion of said pin radially inwardfrom the remote end thereof engages with the associated accumulatorwheel.

6. A device as claimed in claim 1, characterized in that said means forcausing said transfer pins to follow predetermined paths comprises a camfor each denomination order, each said cam being fixed on a guide plateof the accumulator carriage and means urging the transfer pins axiallyinto contact with respective ones of said cams.

7. In a calculating machine of the pinwheel rotor type, means forrotating the rotor in a single direction for addition as well assubtraction, an accumulator, means for shifting said accumulator axiallyrelative to said rotor, and means for moving the pins of the'rotoraxially to represent an entered number, the pins which have not been setrepresenting the complement of the entered number whereby when the rotoris axially displaced to one of its positions relative to theaccumulator, numbers set in the rotor are entered additively into theaccumulator, while in the other axial position of the rotor relative 'tothe accumulator, the unset teeth of the rotor enter the complement ofthe set number additively into the accumulator, to thus subtract the setnumber.

References Cited in the He of this patent UNITED STATES PATENTS2,569,804 Deutsch Oct. 2, 1951

